Cosmology Forum

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Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.
Undergrad New Teacher Seeks Help on Universe Expansion & Space
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Graduate What is the True Meaning of 'Nothing' in A Universe from Nothing?
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Graduate Are You Using the Correct Formula to Convert Redshift to Megaparsecs?
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High School How Universe is Born: Start of Universe
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Undergrad How do we know space is not infinite?
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Graduate How long ago did inflation end in the universe?
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Graduate Are thermalized neutrinos stable at temperatures their rest energy?
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Graduate Some clarity on Black Hole Theory and Observations.
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Graduate If A Kind Soul Would Be Willing - Reality Check
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Graduate Current value of the scale factor(R₀)?
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Graduate What is the current value of the scale factor?
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Graduate Has the Universe's Entropy Decreased Over Time?
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Graduate Weinberg's Cosmology: Neglecting (1+z(eq)) in Denominator
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Graduate I'd like to know your interpretation.
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Graduate Why Doesn't Dark Matter Collapse into Black Holes Like Regular Matter?
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Graduate Protogalactic clouds vs protogalaxies help
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Undergrad Is the Big Bang the Only Explanation for the Universe's Nature?
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Graduate Some repetitive mistakes and misconceptions about DM, MOND, TeVeS, and cosmology
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Graduate Simple proof that the zero-point energy spectrum is Lorentz Invariant?
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Graduate Can a Particle with Repulsive Properties Explain Dark Matter and Dark Energy?
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Graduate Particle horizon in Lemaître model
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Graduate Can Space Warp Independently of Mass?
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Undergrad Why the universe is expanding faster and faster
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Graduate What is the total energy of the universe?
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Undergrad Are supermassive black holes just big stars?
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Graduate Can the Universe's Path be Definitively Determined?
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Graduate What Existed Before the Big Bang?
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Graduate Data to derive Hubble's constant
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High School Why is There Space in the Universe?
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Graduate Did Matter Really Exceed the Speed of Light During the Big Bang?
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Graduate Black Hole Temperature: Stephen Hawking Equation & Calculation Results
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Graduate Time dialation when viewing across the universe
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Graduate Universal mass than a proton?
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Graduate How fringe are alternatives to the Big Bang Theory?
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Graduate What Would It Take to Travel to a Parallel Universe?
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Undergrad S.O.L vs The Big Bang: Speed of Expansion
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Graduate Is there a discrepancy between the Oldest Galaxy and Age of the Universe
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Graduate Dark Energy in the Zero Energy Universe
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Graduate Is There a Ground Zero for the Big Bang?
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Graduate Dark matter vs. modified gravity?
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Graduate Time variable of space-time at the end of universe
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Undergrad Computer simulations of expanding space
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Undergrad The age of the universe vs. the speed of light
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What are some recommended Cosmology books?
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Graduate The expansion of the universe and gravity: One question.
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Graduate String Theory and Eternal Inflation
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Undergrad Could the Big Bang Have Created a Black Hole?
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Graduate Can a New Theory Accurately Predict the Composition of the Universe at Any Age?
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Graduate Just a Little Mind Game re: Superluminal Neutrino Velocities
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Graduate Deriving a scale factor expression for FLRW model
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Are black holes really the cookie monsters of the universe?
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Graduate Question: What is the Universe Expanding Into?
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Graduate Inflation and expansion of spacetime
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Graduate Dark energy <=> negative energy?
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Graduate Unraveling the Mysteries of Black Holes and the Big Bang
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Graduate Could the Universe Be Rotating Instead of Expanding?
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Undergrad The Universe may eventually stabilize?
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Graduate How is my short essay so far? Accurate?
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Graduate Is the universe an axiomatic system?
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Graduate Is the Universe on the outside or inside?
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Graduate Why don't we see a lot of matter around black holes? And can we observe it?
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High School Difference between open and closed Universes?
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Graduate Might inflationary multiverses bumping cause anisotropy?
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Graduate Entropy & Expansion: Physical Interpretation of Maximum Entropy
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Graduate How Many New Galaxies Will Appear in the Next Million Years?
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High School Simplest Understanding of the Universe
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Graduate Is time linear or cyclic in a flat, zero energy universe?
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High School Any Ideas for a Good Physics Research/ Report Project
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Graduate Entropy, heat death and black holes
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Graduate Absolute Zero and implications
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Graduate Has entrophy in the univerese increased throughout it's life.
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Undergrad Question about the expansion of space.
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Graduate Is Hubble's Law Applicable in a Co-Moving Frame?
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Graduate Is Our Expanding Universe the Result of Black Holes from Other Universes?
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Graduate Is the Universe Actually made of Math
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Undergrad Zero to infinity can we assume same for universe ?
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Graduate Using WMAP to measure the Hubble's constant
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High School Which scientist discovered the concept of a collapsing universe?
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Graduate How Does a Black Hole Affect Time?
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Graduate Big Crunch may create time-reversal?
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Graduate What exists beyond the Universe?
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Graduate Do Dark Matter and Black Holes Influence Each Other in Cosmology?
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Undergrad How far did the signal of life in earth travelled yet?
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Graduate Age of Universe (Liddles Modern Cosmology)
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Graduate What Is the Role of Thought in a Predetermined Universe?
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Graduate An embarrassing question: what were the boundaries of the universe
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Graduate What makes Dark Energy cause Acceleration of the Expanding Universe?
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Graduate Is our entire universe observable?
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Undergrad Expansion of space and dark matter
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Graduate Do All Black Holes Exhibit Rotation?
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Graduate Einstein wrong about speed limit?
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Graduate Oort Cloud Dynamics: Speculations on Origins in a Sci-Fi Novel
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Graduate Expanding Universe vs. Shrinking Matter
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High School How do we know the universe is expanding?
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Graduate Space-Time Black Holes: Measuring Warped Space/Time
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Graduate Universe expansion + light speed limit -> scale factor linear in time?
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Undergrad Are exploding supernovae responsible for heavy metal content in ancient stars?
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Graduate How does the twin paradox work in a circular orbit?
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Graduate Low entropy big bang Where am I going wrong with this interpretation?
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Graduate Big crunch versus the Cosmological Constant
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